Louisville Water’s Crescent Hill Water Treatment Plant (CHWTP), the largest water treatment plant in the state, and B.E. Payne Water Treatment Plant (BEPWTP) provide safe, reliable drinking water to Louisville Metro and surrounding counties. For over 50 years, solids residuals, byproducts of the water treatment process, have been successfully managed by Louisville Water through a complex system of pipelines conveying the residuals to the BEPWTP Lagoons approximately nine miles away. Although this system has provided steady, uninterrupted service for over half a century, signs of deterioration have surfaced, highlighting the critical single point of failure in the event of an emergency. To prevent a single pipeline from causing numerous permitting and supply issues in such an event, Louisville Water and HDR undertook the design of a fully redundant solids conveyance system from the CHWTP to the BEPWTP Lagoons. Using results from a detailed hydraulic study, the project team developed a two-phase project including a traditional force main and a low-pressure gravity force main. Segment 1 was broken into two sub-phases: a new 20-inch force main through the CHWTP property; and a rehabilitation of an existing 36-inch raw water main to a solids handling main. Segment 2 involved a low-pressure gravity main driven entirely by head pressure created from the new 20-inch force main. The design phase of the project included meetings and workshops with Louisville Water and other agency stakeholders (USACE, CSX, Louisville Metro, Public Works). The goal of these meetings was to determine routes with the most hydraulic efficiency and the least public impact to traverse the nine-mile trek from CHWTP to BEPWTP. Louisville Water and HDR met with operations and maintenance staff many times to understand their needs and implement a successful operation and maintenance strategy into the design. This collaboration resulted in the inclusion of various instrumentation devices, valves, drain assemblies, and other appurtenances. The design carried through many iterations as better routes were discovered and stakeholder input was incorporated. The construction of each phase (Segment 1A, 1B, and 2) presented unique challenges. Construction for Segment 1B and 2 began in early 2025, and while Segment 1B was installed smoothly with minimal delay, Segment 2 faced challenges throughout construction. Installed along River Road, one of the main thoroughfares in Louisville, Segment 2 became a test of coordination, public outreach, and quick decision making. Segment 1A is set to begin in early 2026 and is expected to have minimal public impact due to construction taking place mainly on CHWTP property. This presentation will broadly cover elements of the pipeline design, including route analysis and operation and maintenance considerations. Additionally, it will cover the construction of the three segments, mainly Segment 2, including construction techniques and timelines. Lastly, this presentation will highlight the collaborative effort between HDR, Louisville Water, and the contractor regarding public outreach and involvement as major drivers for construction decisions and project timelines.